Electromagnetic brake.



No. 7|5,058.' Patented Dec. 2, I902.

F. HABEB.

ELECTROMAGNETIC BRAKE.

(Application fllod. Apr. 91, 1902.\

WITNESS )W UNITED STATEs PATENT ()FFICE.

FREDERICK I-IABER, OF WASHINGTON, DISTRICT OF- COLUMBIA, ASSIGNOR OF ONE-HALF TO PARLEY H. EATON, OF WASHINGTON, DISTRICT OF COLUMBIA.

ELECTROMAGNETIC BRAKE.

SPECIFICATION forming part of Letters Patent No. 715,058, dated December 2, 1902.

Application filed April 21, 1902.

To all whom it may concern:

Be it known that I, FREDERICK HABER, a citizen of the United States,residin g at Washington, District of Columbia, have invented certain new and useful Improvements in Electromagnetic Brakes; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to ID make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to certain new and I5 useful improvements in electromagnetic brakes; and it has for its object the provision of asimple and efficient form of brake mechanism of this character in which by the arrangement of an electroinagnet in connection with a series of armatures one above another the brake-lever may be caused to travel an indefinite distance, the same depending upon the strength of the magnet and the number of armatures employed in connection therewith.

The construction of printing-presses and other forms of machinery in the operation of which it is frequently found necessary to apply the brake suddenly the distance that the brake-lever is required to travel is frequently considerably greater than the distance included within the field of an electromagnet. Hence the employment of a magnet for operating brakes of this description has heretofore been impossible, and the essential object of the present invention is to overcome the difficulties heretofore experienced and to render it possible to apply all forms of brake by the use of an electromagnet.

0 To these ends and to such others as the invention may pertain the same consists in the novel construction and in the peculiar combination, arrangement, and adaptation of parts, all as more fully hereinafter described,

5 shown in the accompanying drawings, and then specifically defined in the appended claim.

The invention is clearly illustrated in the accompanying drawings, which, with the lotters of reference marked thereon, form a Serial No. 104,023. (No model.)

part of this specification, similar letters of reference indicating like parts throughout the several views, and in which drawings- Figure l is a diagrammatic view of an electromagnetic-brake mechanism embodying my 5 5 invention. Fig. 2 is a side elevation of the invention as applied to a band-brake. Fig. 3 is an enlarged side'view of the electromagnet and its arxnatures. Fig. 4 is a top plan view of the electroniagnet. Fig. 5 is an enlarged 6o sectional detail showing the manner in which the armatures are held in their relative positions.

Reference now being had to the details of the drawings by letter, A represents an electromagnet of suitable power and of ordinary construction.

B is a brake-lever having attached to one of its ends a band-brake C, which is shown as adapted to be applied to awheel D. The opposite or free end of the brake-lever B has socured to and depending therefrom a soft-iron disk or armature E.

F F are soft-iron disks arranged one above another, the several armatures or disks being 7 5 held in their relative positions by means of bolts G. This construction will be readily understood upon reference to Fig.'5 of the drawings, in which it will be noted that the lower armature or disk F has at its longitu- 8o dinal center a screw-threaded opening to receive the screw-threaded lower end of the short bolt G, which bolt is passed downward through the next succeeding armature above it, the opening in said disk having a diameter at its lower end less than the diameter of the main portion of the opening, thus permitting the armature to be moved vertically within the prescribed limit, but preventing the disconnection of the armatures by reason of the 0 engagement of the head of the bolt G with the shoulders formed by the contracted lower end of the opening in the armature, as will be readily understood. It is my purpose to arrange in a continuous series the magnets 5 F, each of the armatures being connected in the manner described with the next succeeding armature, the lower disk or armature of the series being adjacent to the magnetic face of the electromagnet. It will be at once evi- 10o dent that the number of disks or armatures employed will depend upon the distance that the brake-lever may be required to travel in applying the brake.

Referring to Fig. 1 of the drawings, in which I have shown a diagram of the brake mechanism and its connection, H is a motor of any suitable well known construction. I is a switchboard, the lever I of which is provided with the usual contact-points and has pivotal connections at one of its ends to the switchboard, which is provided with the usual indicating-scale 1 The switch,it will be noted, is electrically connected with the motor by the wires J J and also electrically connected with the electromagnet by the wires K K, so that by throwing the lever I to the left elec trical connection is made directly with the motor and at the same time the connection with the electromagnet is broken, thus releasing the brake. When it is desired to apply the brake, it is simply necessary to throw the switch-lever I to the right, thus disconnecting the motor and throwing the current through the electromagnet, which being thus magnetized successively draws downward the series of disks constituting supplemental armatures, the lower one of which is within the magnetic field, and the brake is thus instantly applied. The brake is successively moved by the supplemental armatures, the lower one of which is first attracted by the magnet and when energized then attracts the next successive disk spaced therefrom until the series of disks are in contact with each other.

While I have shown the mechanism as applied to a band-brake, I do not desire to limit myself to the application of the invention to a brake of this character, as it is evident that it is equally well adapted for use in connection with any form of brake the operation of which depends upon lever mechanism. It is also at once evident that the invention is capable of many modifications in detail without departing from the spirit of myinvention, as any suitable means for holding the several disks or armatures normally in their relative positions and at the same time admit of their acting in unison when magnetized may be employed.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

The combination with a magnet and its armature, of a series of supplemental armaturedisks spaced from each other and from the magnet-armature, and screws mounted in the armature-disks and having headed portions slidably connected to the disks next above, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

FREDERICK HABER. Witnesses:

A. L. HOUGH, FRANKLIN H. HOUGH. 

